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손보형,이효빈,황호길,윤창륙,여환호 大韓顎顔面成形再建外科學會 1992 Maxillofacial Plastic Reconstructive Surgery Vol.14 No.4
The author investigated the 162 patients with the condylar fractres of the mandilble who were admitted in Dept. of Oral and Maxillofacial Surgery, Hospital of Chosun Dental School from January 1985 to September 1992 clinically, including fracture incidennce, age and sex of the patients, causes of injures, associated injures, treatments and complications and obtained the following results. 1. Of the 449 patients with mandibular fractures, 162patients suffered condylar fractures(36.1%). 2. Of the 162 patients, males with condylar fractures were 128 patients, by a ratio of 3.8 : 1. 3. The most frequently affected age group was the third decade(32.7%). 4. Falls were ranked as the predominant cause(50.6%), followed by traffic accident(27.8%) and violence (16.0%). 5. The incidence of single condylar fractures was 28% and symphysis fractures were the most commomest of the concomittant injuries(60%). 6. The subcondylar fractures occurred most frequently(41.6%) and anteromedial displacement of the condylar fragments occurred most frequently(45.4%) 7. Of the all condylar fracture patients, children under 15 of age comprized 31 patients(19.1%) and condylar head fractures occurred most frequently at those children. 8. Of the managetments in condylar fractures, open reduction was 52.5% and remainder were closed reduction(47.5%). 9. Complications ensured such as TMJ ankylosis, limitation of mouth opening and mandibular movements, TMJ dysfunction, and anterior open bite.
가토에서 자가점막과 Alloderm 이식에 대한 실험적 연구
이철우,여환호,손보형 朝鮮大學校 口腔生物學硏究所 1999 口腔生物學硏究 Vol.23 No.2
The purpose of this study was to compare the healing process of AlloDerm^(R) and autogenous mucosal grafts clinically and histologically. In this experiment 14 rabbits were used. Two of 14 rabbits were for the control group and 12 for the experimental groups. The experimental groups were subdivided into 1-, 2-, 4-, 8- week experimental group with 3 rabbits on each group. Full thickness defects were made in the both sides of buccal mucosa with size of 1×1㎝, them autogenous mucosa taken form the right side of buccal mucosa was placed in the lift side and AlloDerm^(R) was placed in the right side. We observed the healing process of the operation sites clinically and histologically. The results were as follows; 1. In the control group, the defects were healed by secondary epithelization and had similar color as that of the adjacent tissue, but severe scar contraction could be seen. 2. In the experimental group of mucosal autograft, sloughing of the epithelia layer and ingrowth of the epithelium form surrounding tissue could be seen in the process of healing, but the wound was contracted to some extent. 3. In the experimental group of AlloDerm^(R) grafts, some of AlloDerm^(R) grafts were lost due to necrosis at the 2-, 4-, 8-week experimental group, but the other AlloDerm^(R) grafts were well taken by epithelization and connective tissue ingrowth.
흡수성막과 탈회동결건조골을 이용한 백서골결손부위 골재생에 관한 실험적 연구
김수민,여환호,손보형 朝鮮大學校 口腔生物學硏究所 1999 口腔生物學硏究 Vol.23 No.2
The purpose of this study was to evaluate new bone formation and healing process in rat calvarial bone defects using BioMesh^(R) membrane and DFDB. Forty eight rats divided equally into 4 groups of 1 control group and 3 experimental groups. Standardized transosseous circular calvarial defects (8 ㎜ in diameter) were made midparietally. In the control group, the defect was only covered with the soft tissue flap. In the experimental group 1, it was filled with DFDB only, in the experimental group 2, it was covered BioMesh^(R) membrane only, and in the experimental group 3, it was filled DFDB and covered with membrane. At the postoperative 1, 2, 4, 8 weeks, rats were sacrificed and histologic and histomorphometric analysis were performed. These results were as follows ; 1. In histomorphometric analysis, it showed the greatest amount of new bone formation through experimental in the experimental group 3(P<0.001). 2. The amount of new bone formation at the central portion of the defect was greater in the experimental group 3 than experimental group 2. 3. BioMesh^(R) membrane began to resorb at 1 week and resorbed almost competely at 8 weeks after operation. 4. The collapse of membrane into the defect was observed through the experimental periods in the experimental group 2. In the area of collapsed membrane, new bone formation was restricted. These results suggest that maintenance of some space for new bone to grow is required in the use of BioMesh^(R) membrane alone in the defect. It is also thought that the use of the membrane may promote new bone growth in DFDB graft.